“Non-removable” flag for embedded tagging of electronics and sewn-in tagging of apparel, to indicate that a tag cannot easily be removed without compromising the tagged product’s intended functionality

More information can be found on the GS1 Gen 2 page (EPC Global is a subsidiary of GS1). For those that are far away from the topic, the barcodes in supermarket, for example, are also standardised by GS1.